Yes. I do think you it enabled. To confirm, go to about:support, and look for the field that says, "Multiprocess Windows". If it is a value > 0, you do have mul

Yes. I do think you it enabled. To confirm, go to about:support, and look for the field that says, "Multiprocess Windows". If it is a value > 0, you do have multiprocess. If you are on an old version, check for the string "Multiprocess staged rollout". If it is true, you do have e10s enabled. And for checking extension compatibility install this extension, https://addons.mozilla.org/en-US/firefox/addon/add-on-compatibility-reporter/ https://addons.mozilla.org/en-US/firefox/addon/add-on-compat...